class MyTest {
  constructor () {
    this.message = 'hello sz-gp-04'
  }

  show () {
    console.log(this.message)
  }
}

const fn = () => {
  console.log('001110')
}

const myTest = new MyTest()
// export default new MyTest()
export {
  myTest,
  // fn as default // export default fn // import fn, { myTest } from ''
  fn
}